parse_options() in drivers/tty/serial/earlycon.c calls uart_parse_earlycon() in drivers/tty/serial/serial_core.c therefore selecting SERIAL_EARLYCON should automatically select SERIAL_CORE, otherwise will result in symbol not found error during linking if SERIAL_CORE is not configured as builtin Signed-off-by: Tong Zhang <ztong0001@xxxxxxxxx> --- drivers/tty/serial/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 8a0352eb337c..42e844314cbb 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -8,6 +8,7 @@ menu "Serial drivers" config SERIAL_EARLYCON bool + select SERIAL_CORE help Support for early consoles with the earlycon parameter. This enables the console before standard serial driver is probed. The console is -- 2.25.1